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MCQs

Total Questions : 170 | Page 17 of 17 pages
Question 161. For instrumentation system, precision variable voltage-reference system is necessary.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 162. In a Wien-bridge oscillator for obtaining 160Hz frequency output what will be the capacitor value if resistance is selected as 1KΩ?
  1.    10 µF
  2.    1 µF
  3.    1 nF
  4.    10 nF
 Discuss Question
Answer: Option B. -> 1 µF
Answer: (b).1 µF
Question 163. Which of the following are not the standard value of Zener diodes?
  1.    5.1 V
  2.    5.6 V
  3.    5.8V
  4.    6.2V
 Discuss Question
Answer: Option C. -> 5.8V
Answer: (c).5.8V
Question 164. Which of the following can be used as a comparator?
  1.    Zener diode
  2.    Diode
  3.    Operational amplifier
  4.    All of the mentioned
 Discuss Question
Answer: Option C. -> Operational amplifier
Answer: (c).Operational amplifier
Question 165. Which of the following signals are generated by Wien-bridge oscillators?
  1.    Square wave
  2.    Sine wave
  3.    Triangular wave
  4.    Pulse wave
 Discuss Question
Answer: Option B. -> Sine wave
Answer: (b).Sine wave
Question 166. High frequency amplifier in FM telemetry have ______________
  1.    Zero frequency
  2.    Infinite frequency
  3.    Variable frequency
  4.    Fixed frequency
 Discuss Question
Answer: Option D. -> Fixed frequency
Answer: (d).Fixed frequency
Question 167. Ideal op-amp have _______________ input impedance.
  1.    Zero
  2.    Low
  3.    High
  4.    Infinite
 Discuss Question
Answer: Option D. -> Infinite
Answer: (d).Infinite
Question 168. Cathode ray oscilloscope uses ________________
  1.    Wide band amplifier
  2.    Narrow band amplifier
  3.    Zero band amplifier
  4.    None of the mentioned
 Discuss Question
Answer: Option A. -> Wide band amplifier
Answer: (a).Wide band amplifier
Question 169. Gain of wide band amplifiers are ____________
  1.    Very low
  2.    Less than 100
  3.    100 to 300
  4.    300 to 600
 Discuss Question
Answer: Option C. -> 100 to 300
Answer: (c).100 to 300
Question 170. Ideal op-amp have equal input impedance and output impedance values.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False

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